and<T> function

FutureOr<T> and<T>(String description, FutureOr<T> body())

Implementation

FutureOr<T> and<T>(String description, FutureOr<T> Function() body) {
  final state = Zone.current[stateKey] as State?;

  if (state == null) {
    throw Exception('Use and method after given, when, whenThrows or then');
  }

  switch (state.key) {
    case givenKey:
      return given(description, body);
    case whenKey:
      return when(description, body);
    case thenKey:
      return then(description, body);
    case null:
      throw Exception('Use and method after given, when or then');
    default:
      throw UnimplementedError();
  }
}